【正文】 for (i = 0xFF。 i 0。 i)。 //等待8MHz晶體起振 } while ((IFG1 amp。 OFIFG))。 //晶振失效標志仍然存在？ BCSCTL2 |= SELM_2 + SELS。 //MCLK和SMCLK選擇高頻晶振 init_serial()。 _EINT()。 GPRS_Init()。 while(1) { GPRS_SENDDATA()。 GPRS_SENDDATA()。 GPRS_SENDDATA()。 GPRS_SENDDATA()。 GPRS_ACTIVE()。 delay_ms(20)。 }}pragma vector = UART0RX_VECTOR__interrupt void data_Receive(void) // UART接收中斷{ i_receive=RXBUF0。 TC35_RE[i_TC35_RECE++]=i_receive。} 設計實物圖 電路原理圖結 論本文采用嵌入式TCP／IP協議，通過高速8位單片機實現GPRS業(yè)務的數據傳輸功能，具有外圍電路少，電路簡單，系統(tǒng)成本低等優(yōu)點。通過標準RS232串口和外部控制器連接，只需按照預先規(guī)定的協議就可互相通信，通用性較強。系統(tǒng)軟件均使用C語言編寫，稍加改動就可以在各種控制器上實現，可移植性也較強。遠程數據傳輸系統(tǒng)由數據中心和遠程數據采集終端兩部分組成。論文在分析了GPRS技術和無線通信技術之后，論述了系統(tǒng)的結構組成，然后對數據采集終端部分進行了硬件設計，搭建了整個系統(tǒng)的硬件框架，最后對數據中心和數據采集終端兩部分軟件設計并進行調試。設計目標是真正實現基于GPRS的遠程數據采集傳輸，使其能夠運用在實際的系統(tǒng)中，最終面向產品開發(fā)?；贕PRS的系統(tǒng)也有一定的缺點，例如，現在的GPRS網還不夠穩(wěn)定，有丟包的現象；主控制器要實現IP協議，使用起來比較復雜；上位機基于互聯網的解決方案保密性較差等。上述問題經過精細設計是可以避免和解決的，所以基于GPRS的設計仍具有無可比擬的優(yōu)勢。 致 謝值此大學生涯即將結束之際，我要衷心感謝每一位幫助和關心過我的人。感謝我的同學們，在于各位的交流中，使我受益匪淺。感謝我的指導教師老師，從課程學習到項目實踐、就業(yè)和論文寫作，楊老師對我的指導和幫助都不厭其煩、親歷親為，貫穿于學習和生活中的點點滴滴、細枝末節(jié)，通過讓我親身實踐，培養(yǎng)了我很多思考問題和解決問題的思維和方法。楊老師平易近人、嚴于律己、知識淵博，從楊老師身上我們不僅學會了如何去做學問，更懂得了如何去做人。在我以后的人生道路上，楊老師永遠是我的學習典范！ 另外，系里的領導和老師也給了我們必要的指導，我也向系和年級的同學們表示衷心的感謝，感謝你們在我大學四年期間給我的幫助，是你們陪我走過青春！感謝學院對我這幾年的培養(yǎng)。最后還要感謝我的父母，感謝你們在大學期間一直對我的默默支持與理解。 參考文獻[1] 周靜. MSC1210的GPRS無線通信系統(tǒng)設計[D]. 武漢大學, 2010.[2] 百度文庫. 使用單片機實現GPRS通信系統(tǒng)的設計.[3] 蔣延彪. 單片機原理及應用[M].重慶:重慶大學出版社，2005[4] 何立民. 單片機高級教程應用于設計[M]. 北京:北航空航天大學出版社, 1999.[5] 林伸茂. 8051單片機徹底研究基礎篇[M]. 北京:人民郵電出版社, 2004.[6] 北京應嘉興業(yè)科技介紹.[7] [8] [9] Bonner. InSitu Modbus Communication Protocol .2007[10] SIMCOM. SIM300 [11] Hardware Specfication 2006[12] GPS Receiver Familiy Designer Guide. 1999[13] 256Kb Bytewide FRAM Memory[14] , Information System for the EffectiveManagement of [15] Gregory JPEG Still Picture Compression Standard [J].IEEETransactions on Consumer Electronics, :26~27[16] YuWei Huang, Embedded Remote Power Mangement,Sensors for Industry :105[17] 的無線DDN ,2005(5): 23附錄A 英文原文 Research Report General packet radio service (GPRS) is a service available to users of GSM mobile phones of a mobile data. It provides moderate speed data transfer, by using unused TDMA channels in the GSM network. Originally there was some thought to extend GPRS to cover other standards, but instead those networks are being converted to use the GSM standard, so that is the only kind of network where GPRS is in use. GPRS is integrated into GSM standards releases starting with Release 97 and onwards. First it was standardised by ETSI but now that effort has been handed onto the 3GPP.GPRS basicsGPRS is different from the older Circuit Switched Data (or CSD) connection included in GSM standards releases before Release 97 (from 1997, the year the standard was feature frozen). In CSD, a data connection establishes a circuit, and reserves the full bandwidth of that circuit during the lifetime of the connection. GPRS is packetswitched which means that multiple users share the same transmission channel, only transmitting when they have data to send. This means that the total available bandwidth can be immediately dedicated to those users who are actually sending at any given moment, providing higher utilisation where users only send or receive data intermittently. Web browsing, receiving s as they arrive and instant messaging are examples of uses that require intermittent data transfers, which benefit from sharing the available bandwidth. Figure 1 GPRS network structure.Usually, GPRS data are billed per kilobytes of information transceiver while circuitswitched data connections are billed per second. The latter is to reflect the fact that even during times when no data are being transferred, the bandwidth is unavailable to other potential users.GPRS originally supported (in theory) IP, PPP and connections. The latter has been typically used for applications like wireless payment terminals although it has been removed as a requirement from the standard. can still be supported over PPP, or even over IP, but doing this requires either a router to do encapsulation or intelligence built into the end terminal. Figure 2 GPRS network poseGPRS speeds and profilePacketswitched data under GPRS is achieved by allocating unused cell bandwidth to transmit data. As dedicated voice (or data) channels are setup by phones, the bandwidth available for packet switched data shrinks. A consequence of this is that packet switched data has a poor bit rate in busy cells. The theoretical limit for packet switched data is approx. k bit/s (using 8 time slots and CS4). A realistic bit rate is 30–80 k bit/s, because it is possible to use max 4 time slots for downlink. A change to the radio part of GPRS called EDGE allows higher bit rates of between 160 and k bit/s. The maximum data rates are achieved only by allocation of more than one time slot in the TDMA frame. Also, the higher the data rate, the lower the error correction capability. Generally, the connection speed drops logarithmically with distance from the base station. This is not an issue in heavily populated areas with high cell density, but may bee an issue in sparsely populated/rural areas.In GSM system, there are 3 ways to bearing WAP: short message, circuitbased data, and GPRS packet data. Compared with GPRS, the first two ways have some limitations:Short message bearing WAP, the length only 160 bytes, it cannot adapt the WAP service data gradually increasing demand. Short message lack of QoS assurance, the time too long, so the short message bearing WAP is not remended.GPRS bearing WAP has a lot of advant